Articles tagged with Evolution
A new study re-describes the oldest species of dolphin, Eodelphis kabatensis, shedding light on their origins and evolution. The discovery resolves a discrepancy between fossil records and molecular-based studies, providing crucial insights into the evolutionary history of dolphins.
A 325-million-year-old shark fossil has provided new insights into the evolution of jaws in vertebrates, including humans. The study suggests that living sharks are more advanced than previously thought, with internal structures similar to those found in ancient bony fishes.
Research reveals that beneficial insects like dung beetles and flies react differently to ivermectin due to varying levels of sensitivity. This poses a risk to ecosystem functioning and highlights the need for more comprehensive safety tests to protect these organisms.
The study identifies the world's top 50 most evolutionarily distinct bird species, including the South American oilbird and the Christmas Island frigatebird. These species have unique genetic characteristics that make them crucial for preserving the tree of life.
A Yale-led research team developed a new approach to species conservation that prioritizes genetic and geographic rarity. The method was applied to all 9,993 known bird species, revealing areas where maximum conservation of bird diversity can be achieved with minimal investment.
A recent study by Manja Voss challenged the validity of the extinct sea cow species Halitherium schinzii, citing a single tooth as insufficient evidence. The proposed rejection of this specific terminus aims to better handle the known diversity of the sirenian order.
A new species of Stone Oak has been discovered in the Ton Pariwat Wildlife Sanctuary in Thailand. The species, Lithocarpus orbicarpus, is a medium to small tree with unique spherical acorns covered in dense scales.
A Smithsonian scientist has found that similar color patterns in fish larvae indicate a closer evolutionary relationship among species than their adult forms. The research, published in the Zoological Journal of the Linnean Society, reveals phylogenetic connections between marine fish species.
A comprehensive family tree of the spiny-rayed fish group, including tuna and seahorses, has revealed surprising relationships and shed light on their evolution and diversity. The study found that some groups of fish have undergone rapid diversification followed by a slowdown in evolution.
Researchers found that starfish with intact eyes move towards the reef, while those without eyes walk randomly. The study suggests that starfish nervous system can process visual information, pointing to an underestimation of echinoderms' capacity.
A recent study by University of Michigan researchers has found that sturgeon have evolved at an incredible rate in terms of body size, with some species reaching sizes comparable to those of Volkswagen vans. This discovery challenges the common perception of sturgeon as 'living fossils' and sheds new light on the evolutionary process.
A new species of theropod dinosaur, Aorun zhaoi, has been discovered in Western China, dating back over 161 million years. The young dinosaur is estimated to be around 1 meter long and weighed 1.5 kilograms.
Researchers found chimpanzees inspect trees with similar fruit characteristics, relying on botanical knowledge to predict fruit availability. This discovery provides insights into the evolution of categorization abilities and abstract thinking in humans.
A new study comparing neural responses of birds and humans to music suggests that both share a neural reward system, with females in the breeding state responding similarly to human music. Male birds also exhibit an amygdala response to discordant sounds.
Scientists discover ancient intermediate form of great white shark, which shows modern sharks descended from broad-toothed mako sharks. The discovery pushes the origin of great whites back 2 million years, challenging previous classifications.
A new online platform called OneZoom allows users to explore the evolutionary tree of life in an interactive and intuitive way. By zooming in on different groups of organisms, users can reveal more details about their characteristics, extinction risks, and links to additional information.
Researchers found that BPA alters fish behavior and appearance, leading to inter-species breeding. This process poses long-term ecological consequences, including the potential decline of native species.
Researchers found that geckos evolved sticky toepads repeatedly, with about 60% of species having adhesive pads. The study suggests that adhesive toepads arose independently 11 times and were lost nine times during gecko evolution.
Researchers identify genetic differences between two closely related species of Nasonia wasps that yield distinct wing sizes. The discovery sheds light on the evolutionary origins of shape and size diversity in nature and has implications for understanding cell growth and diseases like cancer and diabetes.
Research reveals that great apes like chimpanzees and orangutans use complex decision-making strategies to weigh risks and rewards. The study found that the apes chose the smaller piece more often when uncertain, suggesting a sophisticated understanding of probability and risk assessment.
Researchers have solved the debate on which bird digits exist, finding that precursor cells in pb can form a thumb despite pa cells dying off during development. The study, published in Nature, reveals new insights into embryonic development and vertebrate evolution.
David Sloan Wilson's book applies evolutionary theory to urban planning, using natural phenomena like wasps and crows to understand human behavior. He creates a map of Binghamton neighborhoods reflecting civic engagement, providing insights into how cities define us.
Researchers found that closely related species respond similarly to noise by tweaking their songs in different ways, with plumbeous vireos raising the pitch of their lowest note and grey vireos adjusting the highest part of their song. The study provides insight into how birds cope with increasing noise levels in their environments.
A large-scale citizen science project has found that banded snails have evolved to have a single dark spiral band around their shell, with no correlation to temperature changes. Researchers suspect this may be due to a decrease in bird predation or small environmental changes.
A new study by UC Davis found that two groups of pupfish from the Bahamas and Yucatan peninsula show extreme evolutionary changes, adapting to specialized diets in just a short period. The research suggests that these rapid evolutions are unique to these specific environments.
Researchers found that flying female fireflies receive nuptial gifts from their mates, whereas wingless females do not. This suggests that flightless females prioritize reproduction over male contributions.
A new study of primate aging patterns reveals that humans are not unique in their aging process. By analyzing data from seven species of wild primates, researchers found that human mortality rates increase with age at a similar rate to other primates. The study also confirms the long-held pattern that males die sooner than females as t...
Researchers compared aging patterns of seven species of wild primates with humans, finding that human aging rates fall within the primate continuum. The study also confirms the mortality gap between males and females is narrowest for the least aggressive species.
A study published in Biology Letters reveals a strong correlation between habitat change and significant adjustments in body size among turtles and tortoises. The research shows that chelonians living in marine or island habitats have an optimal body size several times larger than their cousins on the mainland.
Researchers found that 31 non-native freshwater species have established themselves in Galicia, including fish, amphibians, and plants. The study highlights the growing threat of invasive species to biodiversity in the region.
Scientists discovered that rainforest collapse triggered an evolutionary burst among reptiles, leading to increased diversity and adaptation. The event, which occurred 300 million years ago, isolated populations of reptiles and allowed them to evolve in separate directions.
Mutualist systems may play crucial roles in global ecosystem health, but human impacts are forcing them down unprecedented evolutionary paths. Research suggests that small changes or shifts in mutualistic relationships could be the most potent global disruptions.
The TimeTree app combines phylogeny and timescale data to provide a powerful tool for understanding the interrelationships and diversity of living things. By searching for two organisms, users can find when they shared a common ancestor, with results available in seconds.
Ancient corals consisted of mostly separate sexes and required a brooding period to evolve into spawning hermaphrodites. The evolutionary origins of coral sex are complex, likely related to the challenges of shallow tropical reefs.
Researchers from UBC have developed a mathematical model that unravels the generation of biological diversity within and between species. The model suggests that multiple traits acting in concert can generate diversity even with weak interactions, mirroring the complexity of reality.
Bestselling journalist Robert Wright will present his new book "The Evolution of God," a provocative interpretation of the evolution of religion and our concepts of God. This event marks one of several 'Darwin Day' events at Stevens to honor the 150th anniversary of Charles Darwin's publication.
Researchers have unraveled the evolutionary relationships among various species of box jellyfish, providing insight into their toxicity. The study could help develop antivenoms and treatments for deadly stings.
A new study published in Current Biology found that a parasite killing male butterflies caused a rapid shift in the sex ratio of a tropical butterfly species, from 2:1 to 10:1. The researchers used museum specimens and modern tools to analyze the changes, providing insight into evolutionary processes.
Researchers at Duke University Medical Center propose that the appendix serves a critical function as a safe haven for good bacteria. A new study reveals the appendix is more widespread and has been around for at least 80 million years than previously thought, contradicting Darwin's theory of vestigial organs.
A study of marine clams found that closely related clusters vanish together more often than expected, indicating that vulnerability to extinction is linked to evolutionary family history. Conservation efforts should focus on protecting the most fragile families to preserve evolutionary history.
The study found that non-genetic variation acquired during an organism's life can be passed on to offspring through epigenetic means, affecting traits such as eye outgrowths and reproductive hormones. This phenomenon has significant implications for the study of evolution, heredity, and development.
A rapid assessment program expedition to Papua New Guinea's highlands wilderness revealed 50 new spider species, three frogs, two plants, and one gecko. The discovery underscores the region's critical role in sequestering carbon dioxide and highlights the importance of indigenous knowledge for conservation.
Researchers explore social behavior in various animal species, including birds and gerbils, to understand how they use social cues for mating, diet, and survival. These findings demonstrate that animals have evolved complex social behaviors, challenging the idea of human exceptionalism.
Kenneth R. Miller received the 2008 AAAS Award for Public Understanding of Science and Technology for his sustained efforts in communicating evolutionary science. He made an extraordinarily persuasive public case for the power of science to explain the natural world, upholding the integrity of U.S. science education.
A new study finds that early dinosaurs were not superior to their competitors, the crurotarsan group, which survived two mass extinctions without special traits. The research reveals that dinosaurs lucked out when the crurotarsans were hit hard during a mass extinction event.
Researchers reconstructed ancient Cambrian and recent food webs, showing strong similarities in feeding relationships among marine species. These findings suggest that network structure of food webs may have become established during the initial explosion of animal life, providing insights into modern ecology.
Kenneth Miller, a renowned biologist, will argue at the AAAS symposium that science is grounded in the idea of 'design', highlighting the correlation between structure and function. He suggests that embracing this concept can help reclaim the language of design and make science more appealing to those seeking meaning.
Australian researchers have discovered ancient crayfish fossils, providing evidence that the crustaceans existed on the continent as far back as the Mesozoic Era. The finds offer insights into the ecology of southern Australia during this period, which saw diverse plants and dinosaurs in prolonged polar darkness.
A gigantic palm has been discovered in Madagascar with an unusual and spectacular lifecycle, growing up to 18m high and dying after fruiting. Conservation efforts are underway to protect this critically endangered species, with the aim of disseminating it to botanic gardens and growers globally.
Scientists have demonstrated that fossils can be used to effectively understand complex branching in the evolutionary tree of life. By comparing morphological datasets of living and extinct species, researchers found no difference in the impact on the family tree when fossil data is included or removed.
A new study reveals firefly flash signals are energetically cheap but more conspicuous flashes increase predation risk. This balancing act could generate new firefly species with unique flash codes.
A research team has found ancient bacteria with active and living DNA, marking the oldest finding of organisms containing life on Earth. The discovery sheds light on cell aging and regeneration processes.
Researchers have linked unpredictable rainfall to cooperative breeding in birds, particularly among African starlings living in savannas. This evolutionary adaptation allows more chicks to survive over long periods of uncertain environmental conditions.
Researchers found that when species colonize the deep sea, large-bodied species become smaller and small-bodied species become larger. This pattern is consistent with the island rule, which states that isolated animals evolve to be larger or smaller based on their environment.
The brain's craving for a fix motivates humans to absorb knowledge at an optimal rate, driven by the release of natural opiates. This theory, proposed by USC Professor Irving Biederman, suggests that knowledge addiction has strong evolutionary value due to its correlation with perceived intelligence.
A new model of Titan's evolution, developed by the University of Nantes and University of Arizona, proposes that methane-rich ice stores the moon's atmospheric methane supply. The study validates data from ESA's Huygens probe, showing that methane outgassing occurs through cryovolcanic eruptions, producing temporary flows on the surface.
Species diversity varies greatly across tropical and temperate regions due to differing ecological pressures. Higher rates of evolutionary diversification may contribute to observed gradients in richness.
Researchers used quantitative data to analyze the evolution of acritarchs, a group of ancient microfossils. They found that complexity increased over time but leveled off, with post-Ediacaran acritarchs reaching high levels of morphological complexity but not large sizes.
The Field Museum is part of a 15-20 year program to fill in the Tree of Life, using genetic studies, fieldwork and existing information. The project aims to determine evolutionary relationships among bird species and other groups, with applications in disease research, conservation and ecosystem restoration.
Researchers found that certain fish muscles specialized for fast mating calls are now mutually exclusive with other functions like swimming. The study, on toadfish Opsanus tau, reveals the limitations of biological systems when optimized for one function.